Photography magnification changing device for use with image printer

ABSTRACT

In an image printer of the type wherein the image produced upon the face of a cathode-ray tube are sequentially photographed upon sensitive matter, a photography magnification changing device is provided in which one side edge of an image printer is carried by one of two guide rods in such a manner that said image printer is rotatable about a journal attached to said one guide rod in a plane parallel with the plane including said two guide rods. A lens stand is slidably carried by one of said two guide rods, and said two guide rods each include stopper stands provided with a plurality of stopper pins each having a different length such that said image printer as well as said lens stand may be supported whereby the inclination of said image printer or the position of said lens stand is changed, thereby changing the magnification of a image to be photographed.

United States Patent [72] Inventor Sakae Fujimoto Tokyo, Japan [21 Appl. No. 785,260

[22] Filed Dec. 19, 1968 [45] Patented June 15, i971 [73] Assignee Kabushiki Kaisha Ricoh Tokyo, Japan [32] Priority Dec. 26, 1967 [33] Japan {54] PHOTOGRAPHY MAGNIFICA'I'ION CHANGING DEVICE FOR USE WITH INIAGE PRINTER 3 Claims, 3 Drawing Figs.

52 U.S.Cl 355/63, 95/45, 355/20, 355/41 511 lnt.Cl ..G03b21/08 so FleldofSearch 95/45;

[56] References Cited UNITED STATES PATENTS 2,309,960 2/1943 Kershaw 355/47 3,118,354 1/1964 OBrien 3,118,355 1/1964 Proud Primary Examiner-John M. Horan Assistant Examiner-D. J. Clement Attorney-Burgess, Ryan and Hicks side edge of an image printer is carried by one of two guide rods in such a manner that said image printer is rotatable about a journal attached to said one guide rod in a plane parallel with the plane including said two guide rods. A lens stand is slidably carried by one of said two guide rods, and said two guide rods each include stopper stands provided with a plurality of stopper pins each having a difi'erent length such that said image printer as well as said lens stand may be supported whereby the inclination of said image printer or the position of said lens stand is changed, thereby changing the magnification of a image to be photographed.

PATENTEU JUNI 5 IBYI 31584951 SHEET 1 UF 2 FIG. 1

INVENTOR @7 @41- V' ATTORNEY 5 PATENTED JUN} 5 I97! 3; 584,951

I saw 2 [IF 2 INVENTOR ATTORNEYS PHOTOGRAPHY MAGNIFICATION CHANGING DEVICE FOR USE WITH IMAGE PRINTER BACKGROUND OF THE INVENTION The present invention relates to an image printer and more particularly a device for changing the magnification of an image to be photographed for use with an image printer of the type wherein the image data produced upon the face of a cathode-ray tube are sequentially photographed.

In the conventional device for focusing the image of a cathode-ray tube upon sensitive matter, the lens system and/or the image forcused upon the sensitive matter must be displaced in the direction of theoptical axis of the lens system in parallel with each other. However, in case of the image printer of the heavyweight type, such displacement is so difficult that the baseplate carrying the main body must be carried by the guide rods independently.

In view of the above, the present invention has for its object to provide a device for changing the magnification of an image to be photographed that is simple in const uction and easy and positive in operation for use with an image printer.

SUMMARY OF THE IN\ EN :ON

The present invention relates to a device for changing the magnification of an image produced upon the face of a cathode-ray tube to be photographed upon the sensitive matter. According to the present invention, the main body of the image printerof the type described has its one side edge fixed to one of two guide rods for rotation in a plane parallel with the plane including said two guide rods while the other side edge is supported by one of the stopper pins which will be described hereinafter. A lens supporting stand is slidably fitted over one of the above-described two guide rods and is supported in position by means of another stopper stand having the same construction with that of the-stopper stand whose stopper pin supports the main body of the image printer. Each of the above-described stopper stands is provided with a plurality of stopper pins and fitted over the guide rod for sliding alongand rotating about the guide rod. Therefore, when one of the stopper standsis rotated so as to change from one of the stopper pins to another for supporting the image printer main body or the lenssupporting stand, then the inclination of the image printer main body or the position of the lens supporting stand is changed sothat the magnification of an image to be photographed can be changed. In order to sharply focus an image to be photographed, a stop screw which is threadedly engaged with a groove provided in the other side edge of the image printer main body opposite to the side thereof carried by the guide rod is loosened so as to adjust the inclination of the image printer main body and after the inclination of the image printer has been suitably selected for the sharp focusing, the above-described stop screw is tightened in position again.

Other objects and advantages of the present invention will become apparent from the following description of a preferred embodiment thereof taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a plan view of an image printer incorporating a photography magnification changing device of the present invention with a part of an outer case being rerhoved;

FIG. 2 is a front view thereof with a part of the outer case being also removed; and

FIG. 3 is an enlarged front view illustrating the essential components of a photographic mechanism.

DESCRIPTION OF THE PREFERRED EMBODIMENT In the accompanying drawings, reference numeral 1 designates a cathode-ray tube; 2, an inner case having a through bore 20, in which is disposed the cathode-ray tube l;

3 and 4, guide rods extending in the inner case 2; 5, a main body having a film driving section; 6, a lens stand formed integral with a vertical lens seat 6a; 7, a stopper stand for the lens stand 6 provided with stopper pins 7a, each having a different length, and with the same number of grooves 712 with that of the stopper pins 7a; 8, a stopper stand for the main body 5 provided with a plurality of stopper pins 8a, eachhaving a different length, and with the same number of grooves 8b with that of the stopper pins 8a; 9, an outer case, 10, a door for the outer case 9; l1, hinges of the door 9; 12,'a journal formed integral with the guide rod 3; 13, a pivot fixedly secured to the journal l2; 14, a baseplate of the main body 5 provided with a through bore 14a into which is loosely fitted the pivot 13 and arcuate slots 14b and whose arcuate portions having the same center with that of the thorough bore 14a; 15 and 16, journals formed integrally with the guide rod 4; and 17 and 18, stop screws loosely fitted into the arcuate slots 14b and 140 respectively for securing the baseplate 14 to the journals 15 and 16. The side surface of the lens stand 6 engages with one of the stopper pins 7a while the side surface of the base plate 14, with one of the stopper pins 8a.

Reference numeral 19 designates a driving roller adapted to be driven by a pulse motor; 20, a supporting arm rotatably carried by a pivot 21 secured to the baseplate 14; 22, a pressure roller rotatably carried at the extreme end of the supporting arm 20 and adapted to be pressed against the driving roller 19 by means of a spring when the film is transported; 23, a lever rotatably pivoted by means of a pivot 24 to the baseplate l4 and formed integral with a cam 23a which engages with the side surface of the supporting arm 20; 25a and 25b magazines for loading and receiving sensitive matter; 27a and 27b levers for mounting in position the magazines 25a and 25b upon the baseplate 14 respectively; 28a and 28b, levers for attaching and removing the upper covers of the magazines 25a and 25b respectively; and 29, a microswitch which is adapted to be ac tuated by a lever which is adapted to detect the existence of the film.

Reference numeral 31 designates a lens barrel attached to the lens seat 6a; 32, a lens stand stop screw; 33, a stopper seat attached to the guide shaft 3 and provided with a pin 33a which engages with one of the grooves 7b of the stopper stand 7; and 34, a stopper seat attached to the guide rod 4 and provided with a pin 34a which engages with one of the grooves 8b of the stopper stand 8.

Next the mode of operation of the image printer having the construction as described hereinabove will be described in detail hereinafter. First the roll sensitive matter is pulled out of the magazine 25b, engaged with the pressure and driving rollers 22 and 19 and wound up in the empty magazine 25a. The image 1a of the cathode-ray tube 1 is focused upon the cylindrical surface of the driving roller 19. When the lens stand 6 is vertically moved so as to change the photography magnification, the image to be photographed upon the sensitive matter can be focused in the following manner. That is, first, the stop screws 17 and 18 are loosened so that the baseplate 14 may be rotated about the pivot 13, thereby vertically moving, as desired, the film surface in engagement with the outer periphery of the driving roller 19. Thereafter, when the sharp focus is obtained, the baseplate 14 is secured to the journals l5 and 16 again by tightening stop screws 17 and 18.

In order to facilitate the rapid photography magnification change as well as the focus adjustment, the lengths of the stopper pins 7a and 8a are predetermined in such a manner that the image la upon the face of the cathode-ray tube may be focused sharply upon the cylindrical surface of the driving roller 19 while the stopper pins 70 and 8a are maintained in engagement with the side surfaces of the lens stand 6 and the baseplate 14 respectively. The suitable selection of the lengths of the stopper pins 7a and 8a can be made in such a manner that the stopper stands 7 and 8 are made to slide in the direction of the baseplate along the guide rods 3 and 4 so as to disengage the pins 33a and 34a from the grooves 7b and 8b respectively, thereby rotating the stopper stands 7 and 8 so as to engage the pins 330 and 34a into different grooves 7b and 8b again.

The present invention has been so far described with a particular reference to the preferred embodiment thereof, but it will be understood that variations and modifications can be effected within the spirit of the present invention as described hereinabove and as defined in the appended claim.

lclaim:

l. A photography magnification changing device for use with an image printer, comprising:

a lower base section including a light source;

a pair of guide rods mounted on said base section and extending vertically upward in parallel spaced relation;

a pair of stopper stands, one of said stands mounted on one of said guide rods generally adjacent said base section and the other of said stands mounted on the other of said guide rods remote from said base section;

a lens stand separate from said base section and positioned upwardly therefrom, said lens stand having a lens mounted therein in alignment with said light source, said lens stand mounted for slidable vertical adjustment on said one guide rod incontact with said one guide stand;

a main body of predetermined mass including a baseplate on which are mounted film magazines, film rollers and positioning cam and lever means, said main body being separate from and positioned upwardly from said lens stand, said baseplate including a pivot mounting on said one guide rod, said baseplate further including a slidable journal means selectively fixable on said other guide rod;

said stopper stands each including a plurality of stopper pins of varying length, said stopper stands being selectively slidable and rotatable on said guide rods to bring one of said-pins of said one stopper stand into supporting relationship with a lower edge of said lens stand and to bring one of said pins of said other stopper stand into supporting relationship with a lower edge of said baseplate.

2. A photograph magnification changing device according to claim 1, in which locking means is mounted on said baseplate to selectively release said journal means for pivotal movement of said main body and baseplate, and said locking means is selectively lockable to fix said main body and baseplate relative to said other guide rod.

3. A photography magnification changing device according to claim 1, in which each stopper stand includes a seat having a fixed pin, said plurality of varying length pins are located in a rotating part of said stopper stand which includes a plurality of corresponding grooves, one of said grooves being slidable over said fixed pin when a selected varying length pin makes contact with one of said lower edges. 

1. A photography magnification changing device for use with an image printer, comprising: a lower base section including a light source; a pair of guide rods mounted on said base section and extending vertically upward in parallel spaced relation; a pair of stopper stands, one of said stands mounted on one of said guide rods generally adjacent said base section and the other of said stands mounted on the other of said guide rods remote from said base section; a lens stand separate from said base section and positioned upwardly therefrom, said lens stand having a lens mounted therein in alignment with said light source, said lens stand mounted for slidable vertical adjustment on said one guide rod in contact with said one guide stand; a main body of predetermined mass including a baseplate on which are mounted film magazines, film rollers and positioning cam and lever means, said main body being separate from and positioned upwardly from said lens stand, said baseplate including a pivot mounting on said one guide rod, said baseplate further including a slidable journal means selectively fixable on said other guide rod; said stopper stands each including a plurality of stopper pins of varying length, said stopper stands being selectively slidable and rotatable on said guide rods to bring one of said pins of said one stopper stand into supporting relationship with a lower edge of said lens stand and to bring one of said pins of said other stopper stand into supporting relationship with a lower edge of said baseplate.
 2. A photograph magnification changing device according to claim 1, in which locking means is mounted on said baseplate to selectively release said journal means for pivotal movement of said main body and baseplate, and said locking means is selectively lockable to fix said main body and baseplate relative to said other guide rod.
 3. A photography magnification changing device According to claim 1, in which each stopper stand includes a seat having a fixed pin, said plurality of varying length pins are located in a rotating part of said stopper stand which includes a plurality of corresponding grooves, one of said grooves being slidable over said fixed pin when a selected varying length pin makes contact with one of said lower edges. 